Door lock



May 31, 1938. P. Nil-:DERDRENK v 2,119,175

DOOR LOCK Filed July 22, 1957 2 sheets-sheet 1 Irwemtorl mf/CM mw, @3am/L7 f May 31, 1938. P. NIEDERDRENK 2,119,175

I DOOR LOCK Filed July 22, 1937 2 Sheets-Sheet 2 Inventor,

Patented l May 3,1, v

1 UNITE-D STATss PA-TENT oFFlfcsz v Doon. mex reni Nl'eaerdrenk, Velbert, oei-nm Application July 2z, lssmserlal No. 155,128 In Germany November 12, 193@ .A e calmeY Y(ci. vca -1.4.3)` This invention relates 'tofimprovements in door locks or more particularly to a bolt and its-operating mechanism sons. to lock said bolt in its full or halfstroke locking position. Compared;

not possible. been achieved by securing the bolt in its respective positions, i. e. half or 15 full stroke,4 by means of a locking pin adapted to engage notches provided in the bolt'body, which latter is actuated by a cam disk connected with a turning knob orkey. Y

In the accompanying drawings the improved 20 bolt with locking mechanism according to the v is illustrated by way oi ex- .present invention ample, it shows: 1 l

Fig. 1a vertical longitudinal section of the lock with the bolt secured in halt vstroke position. Fig. 2 a similar section of the lockwith the bolt pushed back, i. e. open position,

Fig. 3 a similar section ofthe lock on its lock-v ing stroke, being disengaged fromA the locking pinI` i l` Y l n 0.-- Fig. 4 a similar section of the lock' vvith4 the bolt in completed end stroke in locked position, .Fig. 5 a horizontal section on line 5-6 of Fig; d and rig; c e verdeel section en une s-e er Fig. l..

Figs. 7-10 illusidtaie details. Y Referring to the drawing 3 represents the bolt, I slideably disposed in the lock crampi ofthe box 2 against the action of two helical spring'sl, disposed on guide bars 6 rigidly connected with.v

the bolt head, said guide bars themselves being guided in a transverse'rib 'i disposed within the bol: 2. The bolt body E is provided with a cam slot adaptedfor right "and: left .application or lthe lock, saidcam slot 8 serving :tor-the recepff 45 tien ef ebelt drivmgfpm s exec ente e 'eem disk i2 operable by a knob I0, il, said bolt driving pin 8 being under theA iniluence of a spring I3.

s 1t designates a. laten, mevebly mounted on e tin it and `disposed below th'cam disk 12; said latch 50' 'ib beingprovided vwith a locking pin li6. The latch I 5 is subjected to the influence of a pressure spring l1, which tends to urge said latch and consequently also the locking pin provided thereon in direction against the bolt body i, which is 55 providedion one side edge with. two notches I8,

I9. These notches may' also'be provided on'both side edges of the bolt body so'as to be able to use the lock for right land left application. The Ilocking pin IG secures the bolt in position after its completed stroke or halfV ways by engaging with, the notch I 8 and Il respectively. The notch Il is provided with aslanting side edge 20, by means' of which anautomatic release of the'locking pin I0 is effected on the hack stroke of the boit. The cam. disk i2 with the bolt driving pin '9 is operated by turning .the knob I0 connected ,with said cam disk,;by which t the knob the bolt can be withdrawn. In order to preventthe -bolt' from being drawn Vbackitoo far a stop pin 2i' is provided on the' inner box wall,

rning of v against which stop pin a nose-like projection 25, 1

provided on the cam disk, abuts. As shown in- Fig.- 5 the bolt may also be operated bymeans ot akey'. A Y

The operation of the lock according to the invention is as follows:

If the bolt l is in its .fully advanced locking position as shown in Fig. 4, the locking pin i6 engages thel notch I3. thus securing the bolt in its position. Qn actuating the cam disk IZ-and consequently also the bolt driving pin 91,- attached thereto, bypturning the knob iii, IL'the cam disk i2 forces the locking pin i6 out of the v Y notch-vll, whereby simultaneously the bolt isV completely' withdrawn by the pin d, thus a. door v with the lock attached thereto may be opened.

on releasing the knel lo, the bolt sheets forwardly till the locking pin iii.'v by means of the f spring inuencedlatch ii, is caused to engage toV notch il.- whereby the Abolt is 'secured in its half way position K(see Eig. 1).' Now, on shutting the door, the holt is. caused to move backwards by the pressure against the bolt-nab, whereby the locking pin I6. sliding along theslanting side edge 20 of the notch Il, is automatically. released so that the bolt is permitted to shoot. forwardly (see Fig.,.2). During this advance of the bolt the .pin IB is prevented 'by the cam disk l2 from engaging the notch i8 by reason of said cam. disk at this moment having not' returned yet in its normal position.

` IY claim: Y Y

l, 'I'he combination in a door lock;- of a; bolt,

said bolt comprising a bolt headftwo guide barsand a bolt body, said bolt body being. provided.

with'two notches on its sideV edges and with a cam sotnhelical springs disposed around the said de bars. a. cam disk with a driving pin atadapted to engage with the notches oi the bolt body, a means for actuating the cam disk, said cam disk on being actuated depressing said lock pin and a spring for urging the lock pin of the latch into the notches of the boit body.

2. The combination in a door lock, of a bolt, said bolt comprising a bolt head, two guidebars and a bolt body, said bolt body being provided with two stop notches on each of its side edges. one notch on each side edge having a. slanting side edge, a cam slot provided in the bolt body,

helical springs disposed around said guide bars, a cam disk with a driving pin attached thereto, said driving pin engaging said cam slot, a. latch with a stop pin, said stop pin adapted to engage the notches of the boit body to secure the bolt in position and being acted upon by said cam disk, a spring acting upon said latch for urging the lock pin in locking position and means for operating said cam disk.

PAUL NIEDERDRENK. 

